91 lines
3.0 KiB
Groff
91 lines
3.0 KiB
Groff
.\" $NetBSD: njata.4,v 1.7 2011/02/21 02:31:57 itohy Exp $
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.\"
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.\" Copyright (c) 2006 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by ITOH Yasufumi.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd September 7, 2006
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.Dt NJATA 4
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.Os
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.Sh NAME
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.Nm njata
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.Nd Workbit NinjaATA-32 CardBus IDE controller driver
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.Sh SYNOPSIS
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.Cd "njata* at cardbus? function ?"
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.Cd "njata* at cardbus? function ? flags 0x01 # with wait 0x01"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the following
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Workbit Bus-Master CardBus IDE controller chips:
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.Pp
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.Bl -tag -width "NinjaATA-32Bi" -offset indent
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.It NinjaATA-32Bi
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CardBus / PCMCIA dual mode IDE controller
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.Pq Dq DuoATA .
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This controller is mainly used for portable drives.
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This driver supports the CardBus mode.
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.It NPATA-32
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CardBus IDE controller.
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This controller is widely used for CardBus CompactFlash adapters.
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.El
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.Pp
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These controllers are capable of bus-mastering
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for ATA PIO transfer.
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The
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.Nm
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driver uses the bus-mastering PIO transfer
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unless transfer buffer is unaligned,
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and significantly reduces CPU usage for PIO-only ATA devices
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compared with usual PIO transfer.
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.Sh CONFIGURATION
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The optional flags parameter is the
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.Dq wait
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value for ATA transfers.
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Some combinations of host and device may fail without flags parameter or
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.Tn flags 0x00 .
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In this case try adding wait values like
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.Tn flags 0x01
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or
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.Tn flags 0x11
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(the wait parameter is composed of two 4bit values).
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Smaller wait values should be faster.
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Too long waits may cause transfer errors.
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.Sh SEE ALSO
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.Xr ata 4 ,
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.Xr atapi 4 ,
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.Xr cardbus 4 ,
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.Xr intro 4 ,
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.Xr wd 4 ,
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.Xr wdc 4
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Nx 4.0 .
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.Sh AUTHORS
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.An ITOH Yasufumi
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